IFC 4.3.0.1 (IFC4X3) development

8.9.3.50 IfcPointOnCurve

8.9.3.50.1 Semantic definition

The IfcPointOnCurve is a point defined by a parameter value of its defining curve.

Informal Propositions:

  1. The value of the point parameter shall not be outside the parametric range of the curve.

8.9.3.50.2 Entity inheritance

8.9.3.50.3 Attributes

# Attribute Type Description
IfcRepresentationItem (2)
LayerAssignment SET [0:1] OF IfcPresentationLayerAssignment FOR AssignedItems

Assignment of the representation item to a single or multiple layer(s). The LayerAssignments can override a LayerAssignments of the IfcRepresentation it is used within the list of Items.

StyledByItem SET [0:1] OF IfcStyledItem FOR Item

Reference to the IfcStyledItem that provides presentation information to the representation, e.g. a curve style, including colour and thickness to a geometric curve.

Click to show 2 hidden inherited attributes Click to hide 2 inherited attributes
IfcPointOnCurve (3)
1 BasisCurve IfcCurve

The curve to which point parameter relates.

2 PointParameter IfcParameterValue

The parameter value of the point location.

* Dim IfcDimensionCount

This attribute is formally derived.

BasisCurve.Dim

The space dimensionality of this class, determined by the space dimensionality of the basis curve.

Table 8.9.3.50.A

8.9.3.50.4 Formal representation

ENTITY IfcPointOnCurve
 SUBTYPE OF (IfcPoint);
	BasisCurve : IfcCurve;
	PointParameter : IfcParameterValue;
 DERIVE
	 Dim : IfcDimensionCount := BasisCurve.Dim;
END_ENTITY;

8.9.3.50.5 References

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